If you feel like your upload has stalled, it might be wise to simple stop the upload and try again. The easiest way to do this is to simply click on your browser's "reload" button. That will clear the upload form and allow you to try again. You should verify that your file is OK, it shouldn't be longer than around 50 MB. Also, make sure the file type is .mov, .wmv, or .flv which are our supported file types. Finally, be sure you haven't put any spaces or special characters in the file name.